As Skarssen said - a quick search would give you the answeres. But here's some to sum it up:
2hand vs DW: 2hand is alot more bursty, with their 100k Obli crits (I play UH, and only do some Random BGs as frost for the laugh, but this is a critt I seem to get at times, mostly 60-80ks though.), while dualwield got a more steady dmg and is said to be better against heavy armor while 2hand is better against light armor.
Blood Tap vs Runic Corruption: Blood Tap is great, as you can use them when you want to gain even more boost to your burst periods, build up 12 stacks and get 2 free runes. I tend to macro Necro Strike, Soul Reaper and Death Strike to Blood Tap, so I can use them when I need. Again, I mostly play UH but I do this for frost aswell. This way I can spam Death Strike when I need extra heal, Necro Strikes to slow casting and make that heal absorb stack faster, and to get a Soul Reaper on him when I need to.
Is the macro I use, if I remember correctly.
#showtooltip Necrotic Strike
/cast Blood Tap
/cast Necrotic Strike
You could check out this youtuber for some more info on dualwield pvp:
http://www.youtube.com/watch?v=IrHVi0zvU1o he's not the best PvPer (plays casually at low mmr, but his tips are good)
Hope you'll figure out what to do, dual wield frost is pretty fun to do, though I've only done it in random BGs. Just farm honor for both 2hander and DW, then test it out before using your Conq Points on a Tyr wep.